Internal Basic Stylesheet of the Kobo Software?

[DNSB]

Originally Posted by ibu

Thanks for the hint David.

What a pity, that there are no actual tests for the Kobo devices, particularly for all the relevant CSS properties, e.g. page-break. (I tried to guess the URL for the archive of the features, but without success)

Or are there other websites, who fill the gap?

You can always download the EPUB3 test suite and do your own testing. See EPUB3 Testsuite/ for the test files. This set is from a couple of years back but covers most of the relevant features.

What I found was that the sites that posted tests were always well out of date on the firmware revisions they were testing so I gave up trying to follow them.